<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
			<swiper-item v-for="(item,i) in goods_info.pics">
				<image :src="item.pics_big" mode="widthFix" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 价格区 -->
			<view class="price">
				￥{{goods_info.goods_price}}
			</view>
			<!-- 主体区 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">
					{{goods_info.goods_name}}
				</view>
				<!-- 收藏图标 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 下方运费区 -->
			<view class="yunfei">
				快递：免运费
			</view>
		</view>
		<!-- 商品信息区 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 商品导航组件区 -->
		<view class="goods-nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	import {
		mapState,mapMutations,mapGetters
	} from 'vuex'
	export default {
	
		computed: {
			...mapState('m_cart',[]),
			...mapGetters('m_cart',['total'])
		},
		watch: {
		  // 1. 监听 total 值的变化，通过第一个形参得到变化后的新值
		  total: {
				handler(newVal) {
					// 2. 通过数组的 find() 方法，找到购物车按钮的配置对象
					const findResult = this.options.find((x) => x.text === '购物车')
					if (findResult) {
					  // 3. 动态为购物车按钮的 info 属性赋值
					  findResult.info = newVal
					}
				},
				immediate:true
		    
		  },
		}, 
		data() {
			return {
				goods_info: [], //商品详情,
				// 商品导航区域
				options: [{
					icon: 'shop',
					text: '店铺',
					infoBackgroundColor: '#007aff',
					infoColor: "red"
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				]
			};
		},
		onLoad(options) {

			// 获取商品 Id
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		methods: {
			...mapMutations('m_cart',['addToCart']),
			async getGoodsDetail(goods_id) {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/detail', {
					goods_id
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				// 解决商品详情图片间的缝隙区域
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g,
					'<img style:"display:block;" ').replace(/webp/g, 'jpg')
				this.goods_info = res.message
			},
			preview(i) {
				uni.previewImage({
					// 设置一个索引
					current: i,
					urls: this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onClick(e) {
				console.log(e);
				if (e.content.text === '购物车') {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			},
			buttonClick(e) {
				console.log(e);
				// 1. 判断是否点击了 加入购物车 按钮
				   if (e.content.text === '加入购物车') {
				      const goods = {
				         goods_id: this.goods_info.goods_id,       // 商品的Id
				         goods_name: this.goods_info.goods_name,   // 商品的名称
				         goods_price: this.goods_info.goods_price, // 商品的价格
				         goods_count: 1,                           // 商品的数量
				         goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
				         goods_state: true                         // 商品的勾选状态
				      }
				      // 3. 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
				      this.addToCart(goods)		
					}
				}
			},
				
			

		
	}
</script>

<style lang="scss">
	swiper {
		height: 300px;

		image {
			width: 100%;
			height: 100%;
		}
	}

	.goods-info-box {
		// height: 100px;
		padding: 5px;
		padding-right: 0px;

		.price {
			color: #C00000;
			font-size: 18px;
			margin: 10px 0px;
		}

		.goods-info-body {
			display: flex;
			justify-content: space-between;

			.goods-name {
				width: 80%;
				// padding: 10px 10px;
				font-size: 13px;
				margin-right: 5px;

			}

			.favi {
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				width: 20%;
				border-left: 1px solid #efefef;
			}
		}

		.yunfei {
			// padding: 0 10px;
			color: gray;
		}
	}

	.goods-detail-container {
		padding-bottom: 50px;
	}

	.goods-nav {
		position: fixed;
		bottom: 0px;
		left: 0;
		width: 100%;
	}
</style>
